Alaska earthquakes

M2.9 earthquake 106 km ESE of Atka, Alaska

A magnitude 2.9 earthquake struck 106 km ESE of Atka, Alaska on Fri, Nov 20, 2020, 10:44 AM HAST (20:44 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M4.1 147 km E of Atka, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-11-20 20:44:49 UTC
Depth
19.3 km (12.0 mi), shallow
Epicenter
51.807° N, 172.779° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
2.9ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.3ML, local (Richter)Alaska Earthquake CenterPreliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 8.6 km horizontally, 13.7 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
213°, poorly surrounded by stations
Stations used
17

Nearby

Within 100 km, magnitude 1.5 and up: 35 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 3.6103 km SE of Atka, Alaska · 2140 days ago · 35 km deep · 21 km away
  2. 3.293 km SSE of Atka, Alaska · 2136 days ago · 35 km deep · 74 km away
  3. 2.8101 km SSE of Atka, Alaska · 2136 days ago · 35 km deep · 61 km away
  4. 3.373 km SE of Atka, Alaska · 2131 days ago · 14 km deep · 55 km away
  5. 4.1147 km E of Atka, Alaska · 2129 days ago · 34 km deep · 55 km away
  6. 3.6138 km E of Atka, Alaska · 2129 days ago · 103 km deep · 76 km away
  7. 3.0Andreanof Islands, Aleutian Islands, Alaska · 2125 days ago · 12 km deep · 51 km away
  8. 2.9135 km ESE of Atka, Alaska · 2124 days ago · 103 km deep · 29 km away
  9. 2.7100 km SE of Atka, Alaska · 2124 days ago · 12 km deep · 42 km away
  10. 3.2142 km ESE of Atka, Alaska · 2123 days ago · 35 km deep · 43 km away
  11. 2.786 km E of Atka, Alaska · 2120 days ago · 112 km deep · 34 km away
  12. 1.944 km SSE of Atka, Alaska · 2117 days ago · 25 km deep · 85 km away
  13. 1.643 km SSE of Atka, Alaska · 2117 days ago · 25 km deep · 87 km away
  14. 1.931 km SSE of Atka, Alaska · 2116 days ago · 17 km deep · 82 km away
  15. 1.925 km SSE of Atka, Alaska · 2112 days ago · 71 km deep · 94 km away
  16. 3.137 km ESE of Atka, Alaska · 2112 days ago · 128 km deep · 69 km away
  17. 2.056 km S of Atka, Alaska · 2112 days ago · 24 km deep · 91 km away
  18. 3.1Andreanof Islands, Aleutian Islands, Alaska · 2112 days ago · 128 km deep · 36 km away
  19. 3.666 km E of Atka, Alaska · 2108 days ago · 102 km deep · 52 km away
  20. 2.9Andreanof Islands, Aleutian Islands, Alaska · 2103 days ago · 175 km deep · 97 km away
  21. 1.618 km ENE of Atka, Alaska · 2102 days ago · 10 km deep · 97 km away
  22. 2.956 km NE of Atka, Alaska · 2102 days ago · 201 km deep · 91 km away
  23. 3.4101 km ENE of Atka, Alaska · 2101 days ago · 186 km deep · 93 km away
  24. 2.539 km E of Atka, Alaska · 2096 days ago · 113 km deep · 73 km away
  25. 1.8Andreanof Islands, Aleutian Islands, Alaska · 2095 days ago · 16 km deep · 94 km away
  26. 3.4120 km ESE of Atka, Alaska · 2095 days ago · 35 km deep · 17 km away
  27. 2.684 km SSE of Atka, Alaska · 2094 days ago · 147 km deep · 75 km away
  28. 2.040 km S of Atka, Alaska · 2094 days ago · 44 km deep · 96 km away
  29. 2.765 km ENE of Atka, Alaska · 2091 days ago · 139 km deep · 90 km away
  30. 1.974 km SE of Atka, Alaska · 2086 days ago · 12 km deep · 47 km away
  31. 4.0111 km SSE of Atka, Alaska · 2085 days ago · 34 km deep · 91 km away
  32. 2.382 km S of Atka, Alaska · 2085 days ago · 5 km deep · 94 km away
  33. 3.193 km S of Atka, Alaska · 2085 days ago · 24 km deep · 98 km away
  34. 2.165 km SE of Atka, Alaska · 2084 days ago · 28 km deep · 50 km away
  35. 2.020 km SSE of Atka, Alaska · 2081 days ago · 14 km deep · 96 km away

Before

  1. 3.2112 km ESE of Atka, Alaska · 2147 days ago · 35 km deep · 10 km away
  2. 3.3112 km SE of Atka, Alaska · 2147 days ago · 55 km deep · 33 km away
  3. 3.272 km ESE of Atka, Alaska · 2148 days ago · 100 km deep · 36 km away
  4. 3.090 km SSE of Atka, Alaska · 2148 days ago · 10 km deep · 61 km away
  5. 3.520 km ENE of Atka, Alaska · 2149 days ago · 159 km deep · 94 km away
  6. 4.3130 km ENE of Atka, Alaska · 2151 days ago · 138 km deep · 95 km away
  7. 2.49 km ESE of Atka, Alaska · 2154 days ago · 158 km deep · 97 km away
  8. 2.352 km SE of Atka, Alaska · 2157 days ago · 115 km deep · 62 km away
  9. 2.013 km SE of Atka, Alaska · 2160 days ago · 98 km deep · 94 km away
  10. 1.640 km ESE of Atka, Alaska · 2163 days ago · 78 km deep · 68 km away
  11. 1.534 km SE of Atka, Alaska · 2165 days ago · 12 km deep · 78 km away
  12. 3.057 km ESE of Atka, Alaska · 2166 days ago · 76 km deep · 50 km away
  13. 1.699 km SSE of Atka, Alaska · 2166 days ago · 26 km deep · 88 km away
  14. 2.5192 km ESE of Atka, Alaska · 2166 days ago · 37 km deep · 91 km away
  15. 2.841 km ENE of Atka, Alaska · 2168 days ago · 166 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cnad (also filed as ak020extu47o). Read Thu, Oct 1, 2026, 1:28 PM UTC.